19-4880; Rev 11/09
DS9107
iButton Capsule
www.maxim-ic.com
DESCRIPTION
TECHNICAL DRAWING
The iButton Capsule is a mechanical enclosure to
protect Temperature Logger iButtons (DS1921 and
DS1922 series) from moisture, solvents and
pressure. It provides IP68 protection to the iButton
inside (refer to Application Note 4126: Understanding
the IP (Ingress Protection) Ratings of iButton Data
Loggers and Capsule). The protection level exceeds
the “Water Resistant 3 ATM” requirements.
Screws
25.4
Top
The DS9107 consists of a base with the cavity for a
F5 iButton, a screw-in plug with O-ring to seal the
enclosure, and a top with two stainless-steel screws
to mount the iButton Capsule to a cable, e.g., to
measure temperature at different levels within a
liquid. The cable is inserted into the notch of the plug
where it is held in place by the matching protrusion of
the top piece.
2.54
3.3
Protrusion
Notch
25.4
Plug
6.35
Base, plug, and top are made of polyphenylene
sulfide (PPS). This material is chosen for its
mechanical properties (remains stable during both
long and short-term exposure to high temperatures),
inherent flame resistance, and outstanding chemical
resistance (inert to steam, strong bases, fuels and
acids). Although PPS is virtually insoluble below
200°C, it can be attacked by chlorinated
hydrocarbons. The silicone O-ring matches the
temperature and chemical qualities of the PPS. In
addition, it is resistant to sunlight, ozone, oxygen,
and UV light. The chemical stability of the screws
does not compromise that of the PPS and the
silicone.
12.7
O-Ring
25.4
Base
16.5
Cavity for
F5-size
iButton
6.35
APPLICATIONS
Autoclave Sterilization
Seawater temperature profiling
Monitoring of beverage production
Scientific research
22.2
All dimensions are in millimeters.
ORDERING INFORMATION
PART
DS9107+
5.1
DESCRIPTION
iButton Capsule
+Denotes a lead(Pb)-free/RoHS-compliant product.
iButton is a registered trademark of Maxim Integrated Products, Inc.
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DS9107: iButton Capsule
ABSOLUTE MAXIMUM RATINGS
Temperature Range
-40°C to +140°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.
SPECIFICATIONS
PARAMETER
Weight
Physical Dimensions
Torque for Tightening the Plug
Number of Open/Close Cycles
Number of Autoclave Cycles
Thermal Response Time
Constant
Note 1:
Note 2:
Note 3:
CONDITIONS
Empty
(Note 1)
Maximum torque applied
From 25°C @ 101.3kPa (14.7psia) to
121°C @ 205kPa (29.7psia), tightened
to maximum torque (Note 2)
MIN
TYP
MAX
UNITS
18.4
See technical drawing
36.5
500
grams
mm
Nm


100
(Note 3)
150
s
Equivalent to 2.5ft/lbs.
Absolute pressure is specified; the autoclave peak pressure is 103.4 kPa (15 psig) above the standard
atmospheric pressure.
The value was derived from submerging an iButton capsule with DS1922T inside into 55°C water. The
initial temperature of iButton and capsule was 23.5°C. Without capsule, the response time constant is
approximately 30s. Do not drop an unprotected iButton into water or any other liquid.
Top, Plug, Base
Material: Polyphenylene sulfide (PPS Ryton) with black flat finish, electrically non-conductive.
The injection molding compounds (Ryton® PPS) used in the DS9107 are subject to the general safety provisions of
the U.S. Food, Drug and Cosmetic Act. It is the responsibility of the purchaser/user of the DS9107 iButton Capsule
to determine the safety and suitability of the injection molding compounds for their specific application.
O-Ring
Material: S500-70 Silicone Compound, orange, FDA approved.
Replacement O-Rings: Size AS568-019, inner diameter 13/16 inch, outer diameter 15/16 inch, cross section 1/16
inch, nominal values.
Screws
Material: Type 303 austenitic stainless-steel.
Replacement Screws: flat-head Phillips countersunk, self-tapping, M2.3, 9mm long.
APPLICATIONS INFORMATION
The iButton is inserted into the base part with the data contact towards the bottom of the base. The plug is then
placed into the base and initially tightened by hand. Then the base is held with a wrench, and using a metal stick
inserted horizontally into the notch of the plug, the plug is tightened until its head touches the top of the base. It is
important not to exceed the maximum permissible torque.
The iButton Capsule does not provide electrical contact to the iButton inside. Therefore it is necessary to setup
(mission) the temperature logger first before inserting it into the iButton Capsule. To download the logged
temperature data, the logger needs to be taken out of the iButton Capsule.
Ryton is a registered trademark of Chevron Phillips Chemical Company LP.
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DS9107: iButton Capsule
REVISION HISTORY
REVISION
DATE
8/09
11/09
DESCRIPTION
Added the + sign to the PART number in the Ordering Information table, indicating
a lead(Pb)-free/RoHS-compliant package.
Added a reference to the device’s ingress protection rating and Application Note
4126.
Added statement to Note 3: “Do not drop an unprotected iButton into water or any
other liquid.”
PAGES
CHANGED
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reserves the right to change the circuitry and specifications without notice at any time.
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DS9107+